Enhancement: Redesign shared with list

We've redesigned the shared with list, to achieve more spacing and a better user experience.
We've also fixed a bug, where the role in a child of a share wasn't shown.

https://github.com/owncloud/web/pull/7252
https://github.com/owncloud/web/pull/7310
https://github.com/owncloud/web/pull/7315
https://github.com/owncloud/web/pull/7372
https://github.com/owncloud/web/pull/7402
https://github.com/owncloud/web/pull/7475
https://github.com/owncloud/web/issues/7110
https://github.com/owncloud/web/issues/7340
